condition	mean	min	max
4 h after light	6.808936666666667	6.73658	6.92863
8 h after light	6.854683333333333	6.599019999999999	7.145230000000001
12 h after light	6.86424	6.58235	7.195130000000001
4 h after dark	6.842773333333334	6.54328	7.1642
8 h after dark	6.605426666666666	6.448930000000001	6.858289999999999
12 h after dark	6.4213	6.22392	6.724810000000001